Apple are the king of making average technology look really good, so their launch should be interesting.
Ballmer's demo of the Windows based tablets was boring, even though they did look quite good.
Personally, I want a reasonable specd/price (non Atom) tablet, A4 size, thin and light that I can use in meetings to replace the pad and paper. Wireless LAN, Bluetooth, Gigabit ethernet (for when its on the desk), smooth 1080 video playback, USB and eSATA. And it can detect when your arm is over the tablet so that it knows you're using it like paper and writing on it, not using the arm press to activate half-a-dozen icons on the screen :-)
